Company lists · Data refreshed September 2026

Top 25 Landscape architecture firms based in Seattle, United States

Name: Landscape architecture firms based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 106 companies tracked

RevenueBase identified 106 landscape architecture firms headquartered in Seattle, United States as of September 2026 and tracks 1,834 professional contacts across them, including 850 with verified work emails. New York is the largest hub.

This list covers landscape architecture firms headquartered in Seattle, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

106Companies

1,834Contacts tracked

850Verified emails

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The 25 largest landscape architecture firms based in Seattle, United States

Ranked by team size

Top 25 of 106 landscape architecture firms based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to landscape architecture firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	NAC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	201-500	377 contacts →
	Indirect evidence “NAC is an award-winning design firm with talented team members working in offices in Seattle and Spokane, WA, Los Angeles and San Diego, CA, and Columbus, OH.” Source: RevenueBase Database · checked Sep 17, 2026
2	Mithun	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	51-200	287 contacts →
	Indirect evidence “Mithun is an integrated design firm dedicated to creating positive change in people’s lives.” Source: RevenueBase Database · checked Sep 17, 2026
3	Gglo Design	Strong evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	115 contacts →
	Strong evidence “GGLO is an integrated design firm that provides architecture, urban design, planning, research, interior design, and landscape architecture to clients around the world.” Source: RevenueBase Database · checked Sep 17, 2026
4	Hewitt	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	51-200	111 contacts →
	Partial evidence “HEWITT is an integrated practice of architects, landscape architects and urban designers, committed to creating value for clients and community - meaningful places that connect…” Source: RevenueBase Database · checked Sep 17, 2026
5	The Miller Hull Partnership, LLP	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	51-200	104 contacts →
	Partial evidence “The Miller Hull Partnership is an architecture and planning firm rooted in environmentally-responsible designs that create a regenerative and inclusive future.” Source: RevenueBase Database · checked Sep 17, 2026
6	KPG	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	51-200	66 contacts →
	Partial evidence “KPG was initially formed in 1990 by a team of engineers, architects, landscape architects, and urban designers committed to and focused on community-driven public projects.” Source: RevenueBase Database · checked Sep 17, 2026
7	Weber Thompson	Strong evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	51-200	62 contacts →
	Strong evidence “Weber Thompson is an award-winning, majority women-owned design firm based in Seattle that offers full-service architecture, interior design, and landscape architecture.” Source: RevenueBase Database · checked Sep 17, 2026
8	Collinswoerman	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	51-200	61 contacts →
	Indirect evidence “We believe that great design drives extraordinary value.” Source: RevenueBase Database · checked Sep 17, 2026
9	GGN	Strong evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	42 contacts →
	Strong evidence “GGN is a landscape architecture, design, and collaborative strategies firm based in Seattle.” Source: RevenueBase Database · checked Sep 17, 2026
10	Board & Vellum	Strong evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	37 contacts →
	Strong evidence “Board & Vellum is a multidisciplinary design firm based on Capitol Hill in Seattle, offering architecture, interior design, and landscape architecture for residential, commercial…” Source: RevenueBase Database · checked Sep 17, 2026
11	Graphite Design Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	34 contacts →
	Indirect evidence “Graphite Design Group is a Seattle-based design firm recognized for crafting people-focused integrated environments that elegantly solve complex problems.” Source: RevenueBase Database · checked Sep 17, 2026
12	HBB Landscape Architecture	Strong evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	34 contacts →
	Strong evidence “HBB is a 20 person professional Landscape Architecture, Urban Design, and Planning firm located in Downtown Seattle.” Source: RevenueBase Database · checked Sep 17, 2026
13	MIG SVR	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	201-500	29 contacts →
	Indirect evidence “SvR Design Company was founded in 1989 with a mission of providing innovation in the built environment.” Source: RevenueBase Database · checked Sep 17, 2026
14	Weinstein A U	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	26 contacts →
	Indirect evidence “At Weinstein AU, we look for ways to make our complex world a more balanced, inspirational, and productive place in which to live, work, and participate in civic life.” Source: RevenueBase Database · checked Sep 17, 2026
15	Johnson Braund, INC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	21 contacts →
	Partial evidence “Johnson Braund is a full-service architecture firm founded in 1977 that has been designing projects across the nation.” Source: RevenueBase Database · checked Sep 17, 2026
16	Jones & Jones Architects Landscape Architects Planners	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	21 contacts →
	Partial evidence “Jones & Jones is a 40+ year collaboration of architects, landscape architects and planners grounded in a commitment to place, community identity and nature.” Source: RevenueBase Database · checked Sep 17, 2026
17	Fora Landscape Architects	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	18 contacts →
	Partial evidence “Our passion lies in shaping ideas, giving form to vision, and creating an enduring connection to landscape.” Source: RevenueBase Database · checked Sep 17, 2026
18	Plantscapes INC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	51-200	18 contacts →
	Partial evidence “Effective interior and exterior landscape management requires a special appreciation of the way plants help define a business environment.” Source: RevenueBase Database · checked Sep 17, 2026
19	Site Workshop Landscape Architecture	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	16 contacts →
	Indirect evidence “We founded Site Workshop with the intent to work on projects that enrich the local community, regardless of size or scale.” Source: RevenueBase Database · checked Sep 17, 2026
20	Cast Architecture	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	16 contacts →
	Partial evidence “CAST architecture is a Seattle-based firm with extensive experience designing contemporary spaces throughout the Northwest.” Source: RevenueBase Database · checked Sep 17, 2026
21	J.A. Brennan Associates, Pllc	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	1-10	14 contacts →
	Indirect evidence “The professionals at J.A.” Source: RevenueBase Database · checked Sep 17, 2026
22	Terrain Seattle	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	11 contacts →
	Partial evidence “Luxury Landscape Construction.” Source: RevenueBase Database · checked Sep 17, 2026
23	GCH Planning And Landscape Architecture	Strong evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	10 contacts →
	Strong evidence “Geyer Coburn Hutchins (GCH) is a world class landscape architectural and land planning firm made up of professionals with diverse and complementary backgrounds.” Source: RevenueBase Database · checked Sep 17, 2026
24	Land Morphology	Strong evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	11-50	10 contacts →
	Strong evidence “Land Morphology is a Seattle-based landscape architecture practice focused on creating rich and emotive landscapes across the United States.” Source: RevenueBase Database · checked Sep 17, 2026
25	Wittman Estes	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	1-10	9 contacts →
	Partial evidence “We believe buildings and landscapes can be combined into one interconnected whole.” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: landscape architecture firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names landscape architecture firms.
Partial evidence: Its own public description names part of landscape architecture firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name landscape architecture firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 106 landscape architecture firms based in Seattle, United States

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Landscape architecture firms based in Seattle, United States at a glance

As of Sep 17, 2026

46.3%Verified-email coverage

17.3Average contacts per company

1-10Median size (employees)

182.1%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 106 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among landscape architecture firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Seattle, United States whose own description of what they do matches “landscape architecture firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names landscape architecture firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among landscape architecture firms, and records with no verified work email. Companies headquartered outside Seattle are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 850 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 17, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Landscape architecture firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names landscape architecture firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many landscape architecture firms are there based in Seattle, United States?

RevenueBase identified 106 landscape architecture firms headquartered in Seattle, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

NAC, headquartered in Seattle, tops this list with the largest team on record.

Which city has the most landscape architecture firms?

New York leads with 193 headquartered companies, followed by Los Angeles (122) and Austin (110).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 850 verified decision-maker contacts tracked across these 106 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.